Event-triggered Automatic Requirement Response Method For Residential Microgrid

In today's society,the extensive use of coal,oil and other fossil fuels makes the global climate and environmental problems continue to highlight.Faced with increasingly serious energy and environmental issues,it is no longer a permanent solution to supply human daily life by fossil energy alone.Therefore,the development of renewable energy has become the mainstream direction in the energy field.In recent years,the population proportion of flexible load for residential users has been increasing.At the same time,due to the gradual realization of user-side access to large-scale energy storage equipment,small wind turbines and photovoltaic cells and other distributed generation sources,the residential microgrid(RMG)as a new form of microgrid appears in the public view,with demand-side resources as the core of integrated development.Residential microgrid is an important part of smart grid in the future.The diversity,richness of residential loads and the randomness of electricity consumption behavior bring great challenges to the optimal operation of multi-microgrid system under interconnection cogitation.Therefore,it is of great profit and social value to improve the level of renewable energy consumption and reduce the power cost of the system by studying the optimal dispatch of residential multi-microgrid system and realizing the interconnection and sharing of energy among multiple microgrids.In this paper,current domestic and international research situation about optimized regulation of microgrid and interconnected operation of multi microgrid system are first introduced,and the shortcomings of existing research results are briefly summarized.On this basis,the load scheduling optimization in the residential microgrid system and the interconnection operation among the microgrids are studied with automatic demand response(ADR)strategy,the main contents are as follows:(1)Firstly,according to the operational requirements and load characteristics of the residential microgrid system,the theoretical basis of the automatic demand response and the principle of event triggering are summarized,and their applications in the residential microgrid or similar system is introduced.This paper summarizes the challenges faced by the residential microgrid optimization operation,and the coincidence degree of the event-triggered automatic demand response in detail.(2)Secondly,an event-triggered automatic demand response method is proposed for autonomous operation of a single residential microgrid.Through the event analysis of microgrid operation,the event triggering mechanism is established and applied to automatic demand response.Residential loads electricity consumption behavior is guided,with a unified scheduling potential evaluation method,and combined with the real-time electricity price mechanism,which is minimizing operating cost.The simulation results show that the proposed method can reasonably guide the load to participate in the optimal scheduling of microgrid,so as to effectively improve the renewable energy consumption rate and improve the user's economy.(3)Finally,for the interconnection operation of residential multi microgrid systems,a method of energy sharing between sub-microgrid is proposed to improve the microgird's ability to absorb renewable energy and system reliability.The energy level concept is introduced,and the energy layers of the sub-microgrids in the residential multi microgrid system are divided,and the energy required for the transition of the energy layer is used to characterize the flow energy between the microgrids.While realizing the energy interaction in the residential multi microgrid system,the autonomous operation inside the residential microgrid is ensured.The simulation results verify that the proposed energy sharing strategy promotes the energy interaction between the microgrids,improves the self-sufficiency of the multi microgrid system,and further promotes the local consumption of renewable energy.